.page-about {
  --about-pad: clamp(52px, 8vw, 108px);
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
}

/* 面包屑 */
.page-about .about-crumb { padding-top: clamp(18px, 3vw, 34px); }
.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--muted);
}
.page-about .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 8px;
  color: var(--line);
}
.page-about .breadcrumb__link {
  color: var(--muted);
  text-decoration: none;
  transition: color .16s var(--ease);
}
.page-about .breadcrumb__link:hover { color: var(--cyan); }

/* 首屏 */
.page-about .about-hero {
  padding: clamp(26px, 4vw, 52px) 0 var(--about-pad);
  background:
    radial-gradient(120% 88% at 82% -12%, rgba(0, 240, 200, .11), transparent 62%),
    var(--bg);
}
.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 46px);
  align-items: end;
}
.page-about .eyebrow {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: .32em;
  color: var(--cyan);
}
.page-about .about-hero__title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(33px, 6.2vw, 74px);
  line-height: 1.05;
  letter-spacing: -.01em;
  color: var(--text);
}
.page-about .about-hero__lede {
  max-width: 34em;
  margin: 0 0 26px;
  font-size: clamp(15px, 1.5vw, 18px);
  line-height: 1.85;
  color: rgba(232, 245, 241, .82);
}
.page-about .about-hero__actions { display: flex; flex-wrap: wrap; gap: 12px; }

/* 按钮 */
.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 22px;
  font-size: 15px;
  font-weight: 700;
  color: var(--bg);
  background: var(--cyan);
  border: 1px solid var(--cyan);
  text-decoration: none;
  clip-path: polygon(0 0, 100% 0, calc(100% - 11px) 100%, 0 100%);
  transition: background .16s var(--ease), color .16s var(--ease), border-color .16s var(--ease);
}
.page-about .btn:hover { background: var(--cyan-deep); border-color: var(--cyan-deep); }
.page-about .btn:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }
.page-about .btn--ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--line);
}
.page-about .btn--ghost:hover {
  background: rgba(0, 240, 200, .08);
  border-color: var(--cyan);
  color: var(--cyan);
}

/* 首屏数字条 */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(30px, 4.5vw, 54px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}
.page-about .about-stats .stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px;
  background: var(--bg-2);
}
.page-about .stat__value {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.4vw, 36px);
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--text);
}
.page-about .stat__value.num--gold { color: var(--gold); }
.page-about .stat__label {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--muted);
}

/* 斜切分隔 */
.page-about .about-slash {
  height: 3px;
  margin: 0 var(--gutter);
  background: linear-gradient(90deg, var(--cyan) 0, var(--cyan) 20%, var(--line) 20%, var(--line) 100%);
  transform: skewY(-8deg);
  transform-origin: left center;
}

/* 区块与标题 */
.page-about .about-band { padding: var(--about-pad) 0; }
.page-about .about-band--deep { background: var(--bg-2); }
.page-about .about-head { margin-bottom: clamp(26px, 4vw, 50px); }
.page-about .h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(25px, 3.6vw, 42px);
  line-height: 1.16;
  letter-spacing: -.01em;
  color: var(--text);
}
.page-about .about-head__text {
  max-width: 46em;
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}

/* 时间轴 */
.page-about .timeline {
  display: grid;
  gap: clamp(22px, 3vw, 36px);
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .timeline__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}
.page-about .timeline__rail {
  display: flex;
  align-items: center;
  gap: 10px;
}
.page-about .timeline__dot {
  flex: none;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 5px rgba(0, 240, 200, .1);
}
.page-about .timeline__season {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--muted);
}

/* 层叠纸张卡片 */
.page-about .paper-card {
  position: relative;
  padding: clamp(20px, 3vw, 30px);
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: 8px 8px 0 -1px var(--bg), 8px 8px 0 0 var(--line);
}
.page-about .stage-tag {
  display: inline-block;
  margin-bottom: 14px;
  padding: 5px 14px 5px 10px;
  font-size: 12px;
  letter-spacing: .24em;
  color: var(--bg);
  background: var(--cyan);
  clip-path: polygon(0 0, 100% 0, calc(100% - 9px) 100%, 0 100%);
}
.page-about .stage-tag--gold { background: var(--gold); }
.page-about .paper-card .h3 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2.3vw, 26px);
  line-height: 1.25;
  letter-spacing: -.005em;
  color: var(--text);
}
.page-about .paper-card p {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(232, 245, 241, .78);
}
.page-about .paper-card__list {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .paper-card__list li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}
.page-about .paper-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .66em;
  width: 10px;
  height: 1px;
  background: var(--cyan);
}

/* 团队人数刻度 */
.page-about .team-meters {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(12px, 2vw, 26px);
  margin-bottom: clamp(28px, 4vw, 48px);
}
.page-about .meter {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  margin: 0;
  text-align: center;
}
.page-about .meter__svg {
  width: 100%;
  max-width: 124px;
  height: auto;
  transform: rotate(-90deg);
}
.page-about .meter__track {
  fill: none;
  stroke: var(--line);
  stroke-width: 5;
}
.page-about .meter__bar {
  fill: none;
  stroke-width: 5;
}
.page-about .meter__bar--cyan { stroke: var(--cyan); }
.page-about .meter__bar--deep { stroke: var(--cyan-deep); }
.page-about .meter__bar--gold { stroke: var(--gold); }
.page-about .meter__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.8vw, 28px);
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--text);
}
.page-about .meter__label {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

/* 团队角色与照片 */
.page-about .team-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 44px);
  align-items: start;
}
.page-about .role-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}
.page-about .role-item {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}
.page-about .role-item__title {
  margin: 0 0 7px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  color: var(--cyan);
}
.page-about .role-item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.82;
  color: rgba(232, 245, 241, .76);
}

/* 图片容器 */
.page-about .media-frame {
  position: relative;
  margin: 0;
  background: var(--panel);
  border: 1px solid var(--line);
}
.page-about .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .media-frame__caption {
  display: block;
  padding: 12px 14px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* 内容标准折叠面板 */
.page-about .standards { border-top: 1px solid var(--line); }
.page-about .accordion__item { border-bottom: 1px solid var(--line); }
.page-about .standards__heading {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}
.page-about .accordion__trigger {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 14px;
  width: 100%;
  padding: 20px 0;
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
  color: var(--text);
  font-family: var(--font-display);
  font-size: clamp(17px, 2.1vw, 21px);
  font-weight: 800;
  transition: color .16s var(--ease);
}
.page-about .accordion__trigger:hover { color: var(--cyan); }
.page-about .accordion__trigger:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }
.page-about .standards__index {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--gold);
  font-weight: 400;
}
.page-about .standards__hint {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: .1em;
  color: var(--muted);
}
.page-about .accordion__panel { padding: 0 0 22px; }
.page-about .accordion__panel p {
  max-width: 60em;
  margin: 0;
  font-size: 15px;
  line-height: 1.9;
  color: rgba(232, 245, 241, .78);
}

/* 资料库 */
.page-about .archive-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  align-items: center;
}
.page-about .archive-list {
  display: grid;
  gap: 14px;
  margin: 22px 0;
  padding: 0;
  list-style: none;
}
.page-about .archive-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
}
.page-about .archive-list__k {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cyan);
}
.page-about .archive-list__v {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(232, 245, 241, .8);
}
.page-about .archive-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}
.page-about .archive-note a,
.page-about .next-list a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 240, 200, .4);
  transition: border-color .16s var(--ease);
}
.page-about .archive-note a:hover,
.page-about .next-list a:hover { border-color: var(--cyan); }

/* 合作伙伴 */
.page-about .partner-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}
.page-about .partner-card {
  padding: 22px 20px;
  background: var(--panel);
  border-left: 2px solid var(--cyan);
}
.page-about .partner-card:nth-child(2) { border-left-color: var(--cyan-deep); }
.page-about .partner-card:nth-child(3) { border-left-color: var(--gold); }
.page-about .partner-card__num {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--text);
}
.page-about .partner-card__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 800;
  color: var(--cyan);
}
.page-about .partner-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(232, 245, 241, .76);
}

/* 下一赛季列表 */
.page-about .next-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}
.page-about .next-list li {
  display: grid;
  gap: 8px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}
.page-about .next-list__k {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--gold);
}
.page-about .next-list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(232, 245, 241, .8);
}

/* 结尾行动条 */
.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px 24px;
  margin-top: clamp(30px, 4vw, 48px);
  padding: clamp(22px, 3.6vw, 38px);
  background:
    linear-gradient(100deg, rgba(0, 240, 200, .14), rgba(0, 240, 200, 0) 64%),
    var(--panel);
  border: 1px solid var(--line);
}
.page-about .about-cta p {
  margin: 0;
  max-width: 30em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
}
.page-about .about-cta__actions { display: flex; flex-wrap: wrap; gap: 12px; }

/* 章节锚点轨道 */
.page-about .anchor-rail { display: none; }

/* 中屏及以上 */
@media (min-width: 760px) {
  .page-about .about-stats { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .page-about .next-list li { grid-template-columns: 150px minmax(0, 1fr); gap: 24px; }
  .page-about .partner-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (min-width: 880px) {
  .page-about .about-hero__grid { grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); }
  .page-about .timeline__item {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 30px;
    align-items: start;
  }
  .page-about .timeline__rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding-top: 6px;
  }
  .page-about .timeline__season {
    writing-mode: vertical-rl;
    letter-spacing: .3em;
  }
}

@media (min-width: 900px) {
  .page-about .team-body {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
  }
  .page-about .archive-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  }
}

@media (min-width: 1180px) {
  .page-about .anchor-rail {
    position: fixed;
    right: 26px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 14px;
    padding-left: 16px;
    border-left: 1px solid var(--line);
    z-index: 5;
  }
  .page-about .anchor-rail__link {
    position: relative;
    font-size: 12px;
    letter-spacing: .18em;
    color: var(--muted);
    text-decoration: none;
    transition: color .16s var(--ease);
  }
  .page-about .anchor-rail__link::before {
    content: "";
    position: absolute;
    left: -19px;
    top: 50%;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--line);
    transform: translateY(-50%);
    transition: background .16s var(--ease);
  }
  .page-about .anchor-rail__link:hover { color: var(--cyan); }
  .page-about .anchor-rail__link:hover::before { background: var(--cyan); }
}